矸石充填开采顶板裂隙分布及演化特征分析

doi:10.13722/j.cnki.jrme.2021.0803

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Abstract In order to analyze the fracture characteristics and the movement process of goaf roofs under the condition of gangue backfilled mining，this study based on the engineering conditions of Tangshan Mine F5001 gangue backfilled working face，the inclined borehole detect method is adopted to carry out long-term and fixed point detection on the roof. The distribution characteristics of mining-induced cracks in the roof are described quantitatively by the crack density，and the development process of roof cracks during gangue backfilled mining is revealed by using the method of similar model test. The results show that under the condition of gangue backfilled mining，the structural cracks in the roof usually appear at the boundary of rock strata. The forms of cracks are related to the rock strata where they are located. The roof movement of the coal seam presents five stages including fracture incubation，crack extend in advance，dense fracture development，steady fracture expansion and roof stability. Separation is the main component of the roof subsidence，accounting for more than half of the subsidence value. The conclusions of this paper can provide theoretical basis for support design of backfilled mining and upgrading of hydraulic support in working face.

Key words： mining engineering backfilled mining roof crack evolutionary process borehole detection field measurement analysis

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	Articles by authors
	ZHANG Pengfei1
	2
	ZHAO Tongbin1
	2
	MA Xingyin1
	2
	FU Zhiyong1
	2
	TIAN Xiuguo3
	LI Zhanhai1
	2

Cite this article:

ZHANG Pengfei1,2,ZHAO Tongbin1, et al. Analysis on crack distribution and evolution characteristics of gangue backfilled working face roof[J]. , 2022, 41(5): 969-978.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2021.0803 OR https://rockmech.whrsm.ac.cn/EN/Y2022/V41/I5/969

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